In the heart of Reston, this trail has something for everyone. Made up of mostly wide singletrack, it can be ridden as a four mile (one way) out-and-back trail or you can link up with the Difficult Run Trail and stretch it all the way to the Potomac River in Great Falls Park. The trail can also be done as a ten mile loop with a few miles along Difficult Run and the W&OD trail.
Start in the Skate Nation parking lot (back left-hand corner) off of Michael Faraday Court in Reston. To get there take the Dulles Toll Road to exit for Whiele Avenue. Go North on Whiele and make a right onto Sunset Hills Road. Make the first left onto Michael Faraday Court. Trailhead is at the end of the street.
http://www.singletracks.com/item.php?c=1&i=930